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3d0b8cc30c
The two classes now inherit from a common base MediaTrackBase, to deduplicate the attributes that are shared between the two. The integer ID from the container is used for each track's id attribute. The kind attribute is set to "main" or "translation" according to: https://dev.w3.org/html5/html-sourcing-inband-tracks/ The label attribute is set to the human-readable name of the track, if one is present. The language attribute is set to a BCP 47 language tag, if one can be parsed successfully.
78 lines
2.9 KiB
C++
78 lines
2.9 KiB
C++
/*
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* Copyright (c) 2023, Tim Flynn <trflynn89@serenityos.org>
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* Copyright (c) 2025, Gregory Bertilson <gregory@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Time.h>
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#include <LibJS/Runtime/Realm.h>
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#include <LibJS/Runtime/VM.h>
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/Bindings/VideoTrackPrototype.h>
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#include <LibWeb/DOM/Event.h>
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#include <LibWeb/HTML/EventNames.h>
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#include <LibWeb/HTML/HTMLMediaElement.h>
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#include <LibWeb/HTML/VideoTrack.h>
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#include <LibWeb/HTML/VideoTrackList.h>
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namespace Web::HTML {
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GC_DEFINE_ALLOCATOR(VideoTrack);
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VideoTrack::VideoTrack(JS::Realm& realm, GC::Ref<HTMLMediaElement> media_element, Media::Track const& track)
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: MediaTrackBase(realm, media_element, track)
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{
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}
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VideoTrack::~VideoTrack() = default;
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void VideoTrack::initialize(JS::Realm& realm)
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{
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WEB_SET_PROTOTYPE_FOR_INTERFACE(VideoTrack);
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Base::initialize(realm);
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}
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void VideoTrack::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_video_track_list);
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}
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// https://html.spec.whatwg.org/multipage/media.html#dom-videotrack-selected
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void VideoTrack::set_selected(bool selected)
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{
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// On setting, it must select the track if the new value is true, and unselect it otherwise.
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if (m_selected == selected)
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return;
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// If the track is in a VideoTrackList, then all the other VideoTrack objects in that list must be unselected. (If the track is
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// no longer in a VideoTrackList object, then the track being selected or unselected has no effect beyond changing the value of
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// the attribute on the VideoTrack object.)
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if (m_video_track_list) {
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for (auto video_track : m_video_track_list->video_tracks()) {
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if (video_track.ptr() != this)
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video_track->m_selected = false;
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}
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// Whenever a track in a VideoTrackList that was previously not selected is selected, and whenever the selected track in a
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// VideoTrackList is unselected without a new track being selected in its stead, the user agent must queue a media element
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// task given the media element to fire an event named change at the VideoTrackList object. This task must be queued before
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// the task that fires the resize event, if any.
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auto previously_unselected_track_is_selected = !m_selected && selected;
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auto selected_track_was_unselected_without_another_selection = m_selected && !selected;
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if (previously_unselected_track_is_selected || selected_track_was_unselected_without_another_selection) {
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media_element().queue_a_media_element_task([this]() {
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m_video_track_list->dispatch_event(DOM::Event::create(realm(), HTML::EventNames::change));
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});
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}
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}
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m_selected = selected;
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// AD-HOC: Inform the element node that we have (un)selected a video track for layout.
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media_element().set_selected_video_track({}, m_selected ? this : nullptr);
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}
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}
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